RAF Nimrod aircraft are designed and certified to strict airworthiness and safety standards. The structural integrity of the aircraft is maintained by adherence to the procedures detailed within military airworthiness regulations. The review of airworthiness and safety of the Nimrod fleet is a routine and continual activity that is undertaken by both the Defence Logistics Organisation and the Front Line Command. It includes a comprehensive maintenance and repair process that covers routine flight servicing before and after each flight.
On 21 February 2007, after the discovery of dents in fuel lines, Nimrod MR2 flying was suspended as a precautionary measure. Aircraft were cleared to fly again after checks of the fuel lines proved satisfactory with the first serviceable aircraft operating on 24 February 2007.